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3 years ago

9

Joan had 198 dollars to spend on 9 books.After buying them she had 18 dollars. How much did each book cost?

1 answer:

Fed [463]3 years ago

3 0

She spent 20 dollars on each book because if you subtract 18 from 198 you'll get 180 then you divide that by 9 n it leaves you with 20.

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Two-step equations - integers

Andrews [41]

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answer v = 3/5

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B is the correct answer I think

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3 years ago

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tekilochka [14]

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Step-by-step explanation:

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3 years ago

A rectangular piece of land borders a wall. The land is to be enclosed and to be into divided 3 equal plots with 200 feet of fen

baherus [9]

Answer:

Area = 2500 square feet is the largest area enclosed

Step-by-step explanation:

A rectangular piece of land borders a wall. The land is to be enclosed and to be into divided 3 equal plots with 200 feet of fencing

Let x be the length of each box and y be the width of the box

Perimeter of the box= 3(length ) + 4(width)

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solve for y

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divide both sides by 4

$y=50-\frac{3x}{4}$

Area of the rectangle = length times width

$Area = 3x \cdot y$

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Now take derivative

$A'=150-\frac{9x}{2}$

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multiply both sides by 2/9

$x=\frac{100}{3}$

$A''=-\frac{9}{2}$

For any value of x, second derivative is negative

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$A=150(\frac{100}{3})-\frac{9(\frac{100}{3})^2}{4})$

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3 years ago

I need help pleaseeee, anyone?!!

Black_prince [1.1K]

Answer:

a or d

Step-by-step explanation:

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3 years ago